Calibration for discrete element modelling of railway ballast: A review
The discrete element method (DEM) has been confirmed as an effective numerical method
for modelling railway ballast, and successfully used to analyse a wide range of ballast …
for modelling railway ballast, and successfully used to analyse a wide range of ballast …
[HTML][HTML] Railway ballast performance: recent advances in the understanding of geometry, distribution and degradation
Railway ballast performance is dictated by a complex mix of mechanical properties. These
effect its performance at the particle level for example in terms of particle degradation, but …
effect its performance at the particle level for example in terms of particle degradation, but …
Improved performance of ballasted tracks at transition zones: A review of experimental and modelling approaches
Track transitions such as bridge approaches, road crossings and shifts from slab track to
ballasted track are common locations where track degradation accelerates due to dynamic …
ballasted track are common locations where track degradation accelerates due to dynamic …
Numerical investigation of the behavior of stone ballast mixed by steel slag in ballasted railway track
Recently, implementing steel slag ballast has been proposed as an appropriate material to
substitute stone ballast. In this regard, one of the technical concerns is the behavior of steel …
substitute stone ballast. In this regard, one of the technical concerns is the behavior of steel …
Effect of flexible membrane in large-scale triaxial test DEM simulations
The use of flexible membrane boundaries in simulations of ballast triaxial tests with the
discrete element method (DEM) has become increasingly popular, due to the benefits of …
discrete element method (DEM) has become increasingly popular, due to the benefits of …
Discrete element modelling of railway ballast performance considering particle shape and rolling resistance
To simulate ballast performance accurately and efficiently, the input in discrete element
models should be carefully selected, including the contact model and applied particle …
models should be carefully selected, including the contact model and applied particle …
Numerical simulation of the three-sleeper asynchronous tamping operation of ballast bed based on the virtual unit module and polyhedral ballast model
Z Zhang, H Xiao, Y Wang, Y Chi, MM Nadakatti… - Transportation …, 2023 - Elsevier
Reasonable asynchronous tamping operation plays an important role in improving and
maintaining the performance of the ballast bed. In studies conducted so far, constant velocity …
maintaining the performance of the ballast bed. In studies conducted so far, constant velocity …
Effect of ballast pockets and geogrid reinforcement on ballasted track: Numerical analysis
W Chen, Y Zhang, C Wang, Y Xiao, P Lou - Transportation Geotechnics, 2023 - Elsevier
The presence of ballast pockets in ballast track on soil subgrade is a common problem that
significantly reduces the mechanical properties and durability of both the ballast bed and …
significantly reduces the mechanical properties and durability of both the ballast bed and …
Trackbed settlement and associated ballast degradation due to repeated train moving loads
With increasing train speed and wheel axle load, severe vibrations can occur in a ballasted
trackbed, thereby accelerating the degradation of the ballast particles and ultimately causing …
trackbed, thereby accelerating the degradation of the ballast particles and ultimately causing …
Investigation of railway ballast breakage through large-scale triaxial tests and a new particle breakage approach in discrete element modeling
Crushed aggregates with irregular shapes and sharp corners are preferred ballast materials
to ensure proper track bearing capacity because of good contact between the particles …
to ensure proper track bearing capacity because of good contact between the particles …